Plow.



G. SPALDlNG.

PLOW

APPLIGATION FILED YEB.23. 190v.

Patented Apr. 4, 1911.

[dz/ pg a A TTORNE Y.

WITNESSES U ITED STATES PATENT OFFICE.

I. GEORGE SPALDING, OF STOCKTON, CALIFORNIA, ASSIGNOR T SPALDING PLOW COM- BANY, 0F PITTSBURG. PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PLOW.

To' all whom it may concern:

Be it known that I, GEORGE SPALDING, a

citizen of the United States, and residing said invention, such as will enable others skilled in the art to which it most nearly -appertains to make, use, and practice th same.

This invention relates to an improvement in plows, in which a moldboard plow and a rotary disk are combined to plow a deep furrow.

' a 'plow can cut and A moldboard plow which is wedgeshaped, enters and pries up a quantity of soil and turns it upside down. There is a limit to the depth and width to which such V properly handle the ruptured soil. The prime disadvantage, is the inability of the moldboard to pulverize and elevate the severed soil to a sutficient height to turn it upside down on top of a deep furrow. These disadvantages are in a measure obviated by the use of a rotary, concave disk, the use of which is confined to ground that will pulverize.

In rotary disk plows the practical working diameter of disks is approximately twent -four inches. About one-third of the diameter of the disk is capable of cutting and turning a furrow economically. The forward edge of the disk from the ground to the vertical center of the disk below ground is the cutting edge, which shares oil the soil and passes it onto the remaining surface of the submerged disk, up which it carried by the rotation until the curvature of the disk turns it completely over, and spills it into the open furrow of the former cut. The furrow depth to which a twenty-four inch disk can cut is about eight inches. This depth sufiices in all ordinary cases. In sugar beet culture for instance,it is necessary to plow to a depth of from twelve to sixteen inches. this would require a disk forty-eight inches in diameter, with a proportionate convexity, which from a structural and operative standpoint 1s impractical. A moldboard plow, to accomplish this result, has batiled the plow art. Practical zdemonstration proves that a twenty-four Specification of Letters Patent.

Application filed February 23, 1907. Serial No. 358,912.

.#5. The moldboard plow Patented Apr. 4, 1911.

qualities but lacks the depth qualification.

The object of this invention is to combine these devices in a single implement to plow a smgle compound furrow.

In the accomplishment of the above object the invention broadly consists of two plows to cut one furrow, one-plow being set forward and above the other, and laterally offset therefrom. Common to all wheel plows this construction requires a suitableframe mounted upon wheels set to counteract the.

thrust of the lows. This structure being old no claim oi novelty is made therefor.

Attention is directed to my existing Patents #793204, da'ted June 27th, 1905, and #801410 dated Oct. 10th, 1905, in this class.

In the drawin s: Figure 1 is a side elevation at right angles to the line of draft of a plow constructed in accordance with this invention. Fig. 2 is a diagrammatic rear elevation looking in the direct line of draft of two plows set in the ground in thepreferrecl relation to each other. Fig. 3 is a plan from above of the same.

Because of the peculiar angles, curvatures,

&c., in the relation of the parts of the plow,

.draft is a line through the balance center of the lateral resistance parallel with the forward direction of the plow movement.

In detail the construction consists of the disk #1 suitably journaled in the Lbeam- #2 which is the backbone of the plow, the forward and rear furrow wheels #3 and #4 being attached thereto. One or both of these wheels may be pivoted to facilitate turning corners or may be provided with a tiller to aid in steering the plow. The disk #1 determines the de th of the furrow. This ma be regulated by raising or lowering the urrow wheel #3 and the land wheel 6 is adjustably mounted on the beam :tt7 b0 ted to the back bone of the frame. This beam #7 is provided with a series of holes #8 which provides for the vertical adjustment of this plow. The disk bracket is similarly iltr tached to the beam #2. 'By this constructhe plow 5 is making the initial cut of the next furrow. Assuming that the first furrow has been completed and the second furrow is being plowed, the leading plow turns the earth of the initial furrow into the previously completed initial furrow, and the disk following, overturns this slice and cuts the subsoil, turning the whole over into the first complete furrow and in this manner completing the second furrow. The actual work of this leading plow is merely to sever the soil which falls by gravitation from the moldboaird into the open furrow beneath it. It is obvious that this forward plow is re lieved of the duty of elevating the earth severed, accomplishing a very great saving in draft as the shape of the severed furrow is such that the soil is tilted into the open furrow without having to travel across the cylindrical face of an extended moldboard as is the case of a moldboard which has to sever, elevate and turn the ground up side down. The furrow from the leading plow is delivered in the path of the following disk which in effect. acts as the moldboard for both, with the resultthat the soil from the bottom of the furrow is raised fourteen inches andv forms the top of the soil spilled into the furrow of the former cut. The advantages of this deep out are obvious. The ground is pulverized for a depth of fourteen or more inches; the wornout surface is buried a like depth; and a new surface is thrown. up to the action of the air and the sun.

To throw the second plow into position to begin cutting where the former stopped, it

is offset to the right. This statement will be elucidated by reference to the double soil can be tilled by this progressive action in cutting the furrows. By using mechanical traction, as a locomotive force, speeds canbe attained which will cause a rotating disk twenty-four inches in diameter and a proper curvature to elevate the soil from any depth within the limits of consistent cultivatlon. exceeding eighteen inches; but a considerably greater depth'can beattained by the use of two moldboards and a' disk; one moldboard and two disks or three disks or more set-in the relativepositions comprehended by this invention.

As yet' no demand has been raised l'lavin'g thus described this invention, what i is claimed, and desired'to secure by Letters Patent is,--

l. A tilling machine comprising a mold board plow and a rotarydisk, said moldboardplow being' set in advance of said disk and on a different horizontal plane and a diti'erent vertical plane, said disk being constructed to deepen the furrow opened by said mold board.

2. A tilling machine comprising a mold board plow anda rotary disk, said mold board plow being set in advance of said disk and on a different horizontal plane and also in a different vertical plane, said disk being constructed to deepen the furrow opened by said mold board, and means for adjusting the relative positions of said mold board and disk.

Tu testimony whereof, 'I have hereunto set my hand this 15th. day of February a GEORGE SPALDING.

\Vitnesses:

BALDWIN VALE, F. A. MCGAN. 

